Coke oven door



Nov. 1o, 1931. COTTO f'1,83o,953

COK OVEN DOOR Filed Aug. 2o, 192'/v Patented Nov. 10, 1931 cani. erro,I -or ESSEN-auna, "GERMANY GORE DOOR Application :led August 20, 1927, Serial No.

This invention relates to self-tightening cokeoven doors.

It is well-known, to use an asbestos cord to tighten the door of the chambers of coke ovens, where self-tightening doors are provided for, the asbestos cord being pressed A from the outside into a wedge-shaped joint formed between the door and the door frame, by means of a pressure device. The structures hitherto proposed for 4 this purpose mostly suffer from the drawback, that the applying of the door with the accompanying tightening some of the packing means is very cumbersome and requires much time, and does not aiorda-reliable gas-tight closure of the oven chamber. The invention hasfor its object to obviatethese drawbacks, byproviding a construction which secures an easyplacing ofthe chamber door and a re4 liable gas-tight closure. To this end, -in accordance with the invention a pluralit of bolts are arranged on the outer side o the door, which bolts engage, when the door is set in, pressure pieces having inclined faces provided on a fixed part of the oven, so that the door is pressed automatically on the door frame andthe. pressure is transmitted to the Vpacking means. n y

In prder, to permit the invention to be, more easily understood, a preferred embodi yment of the same is' illustrated by way-of example in the drawings which accompany A, andform part of this specification. In these g tightening coke oven door.

of Fig. 1,

drawingszp Fig. 1 is a vertical section through a self- Fig..2 1s a horizontal section online 2-2 Fig. 3 is scale, y

Fig. 4 is'a detail of a somewhat modified `lform of av device for tightening home the packing means, on an enlarged scale, and

Fig. 5 isa horizontal section'on line of 4.

designed ,asa stopper Acoke oven door a,

.rests 1n the usual manner. in al doorl door,

framel 6, when in closingposition. The door a has lateral flanges a? of a configuration such as toform with frame b an outwardly open va detail of Fig. 1,-on an enlarged] thereon or on an iron hook looselyattached 214,404, and in Germany August 21, 1926. l wedge-shaped groove, see Fig. 2. A packing means, e. g.'an asbestos cord c, is loosel embedded in this groove. An adjusting evice serves to locally tighten the yielding packing means'c by means of a pressure frame mount'-v ed in front of it, this adjusting device substantially consisting of two vertical sheet metal strips d, mounted on the outer side of .the door a, see Fig. 2, bolts e, angular levers f, and inclined pressure, pieces g, inclined toward the oven. The strips-d have a plurality of slots d1 enga ed by a correspondlng number of'bolts e, w ich thus-may vertically shift withindetermined limits. VThe outer ends of the boltseprojectlaterallybeyond strips d and abut on the inclinedpressure pieces g fixed on the tie rails h of the oven on two opposite sides ofthe door, F ig. 2. When the bolts e are moved downward against the inclined faces of pressure pieces g, e. g. by blows of a hammer,'a transmission of the pressure takes place to the angularleversf. `The latter are fixed by pins z' on outer ribs of the door a and may y rock horizontally about-bearings k. Throu an intermediatev piece f1 hinged on them, e levers f abut 0n a tightening frame f2, which is arranged infront ofthe packin mean's and transmits the pressure thereto, t us providing a reliable gas-tight closure.

As illustrated in Figs. 4 and 5,.the frame f2 may be subdivided so as to form individual elements interconnected by. straps f3 and bails m, inorder that local inaccuracies of the abutment surface of the packing means c between ,door a and frame b-may be compensated for. The packing means yc is pressedinward, in

this case too, by bolts `@that engage the back ofthe bailsvm, so that adownward motion of the bolts e may be caused by hammer blows another bolt o loosely resting in slotsd.v The ends of the bolts n and o are guided by `inclined pressure pieces p, provided on the tie rails h ofthe oven, when the door is in place, in such a manner, that the latter is automatically pressed against the frame b.

When the door a is to be placed, this is effected by forwardin the door toward the aperture of the cham r by means of a lifting device, and then lowering the door t such an extent by operating an adjusting device that the bolt n firmly rests on the inclined pressure pieces p. The bolt n is thereby clamped on these faces and the door a is pressed against the door frame b.- The bolt o aswell as the bolts e intended to tighten the packing means c, lower themselves by their own weight onto their respective inclined pressure pieces g fixed on the oven,

to such an extent, that the door and the packing means o are l tightened automatically. Preferably all the bolts are then driven home by hammer blows. Instead of a hammer, any suitable tightening means may be made use of. When the door a is to be opened, a lifting device is run opposite the door and by manipulating an adjusting device t, all bolts are loosened simultaneously and the door a is lifted. After all bolts have been lifted-so far that. they are located above the upper edge of the inclined pressure pieces,'the door is ready to be removed.

What I claim and desire to secure by Letters Patent, is

1. In a coke oven having a door frame, 'a door within said frame, yielding packing means between the door frame and door, rigid inclined pressure pieces arranged on fixed parts of the oven on two opposite sides of the door frame and inclined toward the oven, horizontal lateral projections arranged on said door and adapted to engage and be moved along said inclined pressure pieces and means for transmitting pressure rom said projections to said packing means.

- 2.v In a coke oven having a door frame, a

door within said. frame, yielding packing means between the door frame and door, rigid inclined pressure pieces arranged on fixed parts of the oven on two o posite sides 'of said door frame and incline toward the o ven, a member adapted to shift vertically on said door, and 4lateral projections arranged on said member' adapted to engage and be moved along said inclined pressure ieces and means for transmitting pressure rom said projections to said packing means.

3. In a coke oven having a door frame and adoor within said frame, a packing means embedded in a joint formed between the door frame and door, rigid inclined pressure pieces arran opposlte sides of the door frame and inclined toward the oven, members adapted to vertically shift ony said door in .parallel to one another, lateral rojections arranged on said members and a apted to engage and move on fixed parts of the oven on two.

4. I-n a coke oven having a door frame, a

door within said frame, a packing means embedded in a joint formed between the door frame and door, rigid inclined pressure pieces arranged on xed parts of the oven on two opposite sides of said door frame and inclined toward the oven, members adapted to ver\ tically shift on said door in parallel to one another, said members provided with Vertical slots arranged in pairs at common levels, horizontal bolts extending through the slots, laterally projecting beyond said members and adapted to engage and move along the inclined pressure pieces, tightening means adapted to press against and tighten the packing means in said joint and connections between the tightening means and some of s aid bolts.

5. In a coke oven having a door frame, a door within said frame, a packing means embedded in a joint formed between the door frame and door, rigid inclined pressure pieces arranged on {ixed parts of the oven on two opposite sides of said door frame and inclined toward the oven, members adapted to verticallyshift on said door in parallel to one another, said members provided with vertical slots arranged in pairs, at common levels, horizontal bolts extending through the slots, laterallyprojecting beyond said members and adapted to engage and move along the inclined pressure pieces, a tightening j frame arranged between the horizontal bolts and the packing means and connections mounted for rocking motion and abutting on the horizontal bolts and the last-named frame for transmitting pressure from said bolts to the frame.

6. In a coke oven having a door frame, a door within said frame, a acking means embedded in a -joint forme between said door frame and door, rigid inclined pressure. pieces arranged on {ixed parts of the oven on two op os'ite sides of said door frame and I incline toward the oven, members adapted to vertically shift on said door in arallel to one another, said members provided with vertical slots arranged in pairs at common levels, horizontal bolts extending through said slots, laterally projecting beyond said members and adapted to engage and move alon said inclined pressure pieces, a tightening ame arranged between the horizontal bolts and the packing means, said frame consisting of a plurality of yieldingly interconnected elements, and connections between said lastnamed frame and some of said horizontal bolts.

7. In a coke oven having a door frame, a

door within said frame formed to provide a joint between the door and frame, a packingl means embedded in the joint, rigid inclined pressure pieces arranged on fixed parts of the oven on two opposite sides of the door frame and inclined toward the oven, members adapted to shift vertically on said door in vparallel to each other, said members provided with vertical slots arranged in pairs at common levels, -horizontal bolts extending through said slots, projecting laterally beyond said members and adapted to engage and be moved along said inclined pressure pieces, a tightening frame arranged between the horizontal bolts and the packing means, said frame consisting of a plurality of yieldingly interconnected elements anda plurality of hails, each pivotally connected to two neighboring frame elements of said lastnamed frame and forming connections between said bolts and last-named frame.

Ink testimony whereof, I have signed my name to this specification.

' CARL OTTO. 

